Ideal gas law: The number of molecules in one mole of a substance
A) depends on the molecular weight of the substance.
B) depends on the atomic weight of the substance.
C) depends on the density of the substance.
D) depends on the temperature of the substance.
E) is the same for all substances.

Question

Quizplus · Accepted Answer

The number of molecules in one mole of any substance is always the same, regardless of the substance's molecular weight, atomic weight, density, or temperature. This number is known as Avogadro's number, which is approximately $6.022 \times 10^{23}$ molecules per mole.

Ideal Gas Law: the Number of Molecules in One Mole